Merge pull request #107 from juliomino/master

Add fullscreen support. Closes #89. Thanks to Julien Legras!
Guanako: *word does not allow empty string any more; work on completion outside methods
CMake: Improve gsettings installation.

 * Verify schemas (only with LOCAL option).
 * Copy schemas to build directory when origian schemas changed (only with
   LOCAL option).
CMake: Synchronize buildsystem.
Merge remote-tracking branch 'valama/master'